Valve for hydraulic elevators



(No Model.)

G. H. REYNOLDS. VALVE POR HYDRAULICl BLBVATORS.

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Gr dOItGE Il. REYNOLDS, OF NEXTVT YORK, N. Y., ASSIGNOR OF ONEHALFTO CRANE BROS. MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS.

VALVE FOR HYDRAULIC ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 323,367, dated July 28, 1885.

` Application filed .Tune 2G, 1885. (No model.)

To @ZZ whom it may concern:

Be it known that I, GEORGE H. REYNOLDS, ofthe city and county of New York, in the State of N eiv York, have invented a new and 5 useful Improvement in Valves for Hydraulic Eleva-tors, ot which the following is a speciication.

My invention relates to valves whereby the iioiv of liquid to and from the operating cyl io inders oi' hydraulic elevators is controlled,

and which comprise a cylinder communicating by a circumferential series of slots or openings extending lengthwise of the cylinder, with a beltI or jacket *which is itself in uninter- 1 5 rnpted communication with the operatingcylinder ot' the elevator, and a piston movable lengthwise ofthe cylinder to place said slots or openings in communication with the supply of liquid under pressure or with the diseo charge oi' liquid to the atmosphere. TWhere such slots or openings are ot equal length throughout the circumference ot' the cylinder and the pistoirheads or packings are directly transverse to the axis of the cylinder, the piston will act to open or close the slots or openings simultaneously.

rIhe object of my invention is to provide for opening or closing the slots or openings in the cylinder in succession, or one alter another, in 3o order to avoid such shocks as are caused by the opening` or closing ot' all the slots or openings simultaneously.

The invention consists in the combination, with a valvecylinder having a surrounding 5 belt or jacket, With which it communicates by acircumt'erentiul series of slots or openings, ot' a piston-valve Working in the cylinder, and having its packings or surfaces, `which operate to open and close the slots or openings, ar- 4o ranged obliqu-ely to the axis ot' the valve, whereby, when the valve is moved, the slots or openings will be opened and closed in suc cession, or one after another. rI'his pistonvalve may consist of a single piston-head 4 5 provided with one or more packings; or it may consist of two pistouheads placed at a sut'cient distance apart to straddlc the slots or openings.

In the accompanying dra-Wings Figure l o represents a longitudinal section of a hydraulic valve embodying my invention and mechanism for operating the same. Fig. 2 represents a similar section of a portion of a valve-cylinder and a valve of slightly moditied form, also embodying the invention; and Fig. 3 is 5 5 a diagram illustrating a development of the interior surface of the slotted cylinder, or representing such surface as it would appear in a tlat plane, and showing by a dotted line the edge oi the valve in its relation to these slots 6o or openings.

Similar letters of reference designate corresponding parts in all the figures.

The valve which I have chosen to illustrate my invention, except in so far as it embodies 65 my invention, is similar to that shown in my United States Letters Patent N o. 314,720, dated March 3l, 1885, and the mechanism which l have represented for operating the valve is similar to that shown in said patent. 7o

A designates the valve-cylinder, at one end of Which is a belt or space, A', into which leads the. inlet At for liquid under pressure from any suitable source ot' supply, and at the other end of which is a belt or jacket, A5, 7 5 communicating with the atmosphere or ivith an exhaust-tank. At about the middle ot' the length of the cylinder A it is surrounded by a belt or jacket, A3, having a nozzle or opening, Al,wl1ich is to be placed in uninterrupted 8o communication with the operatingcylinder ot' 'ahydraulic elevator.

On the supplyside or" the cylinder A, I have represented a smaller controlling-cylinder, C, and on the other or opposite side ofthe cylin- 8 5 der A, I have represented a larger controllingcylinder, B. As here represented, a single lining, u2, ot" bra-ss or other material, is ntted to the cylinders A B,and the cylinder A communicates with the belt or jacket A3 bya cir- 9o cumferential series of slots or elongated openings,f. In the lining opposite the discharge or outlet belt A5 is aeircular series of slots or openings, g. l

l) designates the piston-valve, which, as 9 5 here represented, consists of tivo heads set at a sufficient distance apart to straddle or cover the slots or openings j", and each provided with a packing, p. 'lo thelarger controlling1 cylinder, ll5,is fitted a piston, E, and to the 10o smaller controllingcylinder, C, is iitted a piston,F. 'lhetn'opistonsEFandthemainvalve D are all connected together by a common rod, G, so as to move simultaneously, and the movement of the valve and pistons in one direction or the other is controlled by a pilot or auxiliary valve, II, arranged within the chest Bf, which comn'iunicates by passages or ports i t" with the cylinder B on the outer side of its piston IG, and with the exhaust or discharge belt A5.

rIhe connections through which the auxiliary or outlet valve H is controlled by the attendant in the elevator-car are fully described in my patent above referred to, and no explanation of them is here necessary, and the connections through which tlie auxiliary or pilot valve is moved automatically by the move ment of the pistons E F and the main valve D are also fully described in my aforesaid patent, and are not included in mypresent invention. It is suiicient here to remark that by the movement of the main valve rD to the left from the position shown i'n Fig. l the supply space or belt A will by the openings f be placed in direct communication with the belt A3 and with the operating-cylinder of the elevator, and by the movement of said valve to the right from the position shown in Fig. l the operating-cylinder of the elevator will, through thebelt A3, openingsf, and openings g, be placed in direct communication with the exhaust or discharge belt A5.

It will be seen that the piston-headsare composed of disks or plates c, between which are interposed packings p, and, as is clearlyshown in the drawings, these disks 0r plates c and their interposed packings are set obliquely to the axis of the piston 5 hence it will be seen that when the piston is moved in one direction or the other to open or close the slots j" the said slots will not all be opened or closed simultaneously, as wouldbe the case were the packings p arranged in planes directly transverse to the valve, but they will open in suecession or one after another. For example, in moving the valve toward the left from the position shown in Fig. l, those slots or openings j' which are at the top of the cylinder A will be rst opened to the water-supply, and said slots will be opened in succession from the top to the bottom, those slots at the bottom being last opened. In this way not only is the letting on land shutting o of water from the' had passed through it is diverted and caused to find its way through some of the other slots which still remain open. This will be best understood irom Fig. 3, in whichIhave shown the slots or openingsj'as they would appear in a-iiat plane, and-have represented by a dotted line, d, the position which the packing p of the piston-valve occupies relatively to these slots.

In lieu of making the packings of both piston-heads oblique in opposite directions to the axis of the cylinder, as shown in Fig. I, they may be set in parallel planes, or oblique to the axis in the same direction, as shown in Fig. 2, or a single piston-head provided with one or two packings set obliquely to the axis might be substituted for the two piston-heads here shown.

My invention is applicable not only to hydraulic valves in which the valve is operated by the pressure of the motive fluid acting upon controlling-pistons, as illustratedin the drawings, but is also applicable to hydraulic valves, which are operated directly by hand-gear from the elevator car or cage.

hat I claim as my invention, and desire to secure by Letters Patent, isl In a hydraulic valve, the combination of a cylinder having a circumferential series of slots or openings, and a piston-valve movable in said cylinder to open or close said slots or openings, and having its packings in planes which are oblique to the axis of the valve and cylinder, substantially as and for the purpose herein described.

GEO. I-I. REYNOLDS.

/Vitnesses:

L. B. MASON, GEO. G. WELLS. 

